EP0568202B1 - Méthode d'incinération de déchets dans un four rotatif et installation à cet effet - Google Patents

Méthode d'incinération de déchets dans un four rotatif et installation à cet effet Download PDF

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Publication number
EP0568202B1
EP0568202B1 EP93302640A EP93302640A EP0568202B1 EP 0568202 B1 EP0568202 B1 EP 0568202B1 EP 93302640 A EP93302640 A EP 93302640A EP 93302640 A EP93302640 A EP 93302640A EP 0568202 B1 EP0568202 B1 EP 0568202B1
Authority
EP
European Patent Office
Prior art keywords
waste
outlet casing
pipe
kiln
plant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93302640A
Other languages
German (de)
English (en)
Other versions
EP0568202A1 (fr
Inventor
Ib Ohlsen
Hans Henrik Hartington
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FLSmidth and Co AS
Original Assignee
FLSmidth and Co AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FLSmidth and Co AS filed Critical FLSmidth and Co AS
Publication of EP0568202A1 publication Critical patent/EP0568202A1/fr
Application granted granted Critical
Publication of EP0568202B1 publication Critical patent/EP0568202B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
    • C04B7/4438—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes the fuel being introduced directly into the rotary kiln
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/12—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of plastics, e.g. rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/34—Arrangements of heating devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/125—Fuels from renewable energy sources, e.g. waste or biomass

Definitions

  • the invention relates to a method for introducing and incinerating solid combustible waste, such as automobile tyres, in a rotary kiln plant and to a rotary kiln plant for carrying out the method.
  • US-A-4,850,290 discloses a method for firing solid waste through the shell of the rotary kiln via a sluicing arrangement.
  • US-A-4,984,983 further discloses the possibility of introducing waste through the kiln shell, mentioning also an ejector capable of injecting the waste items into the kiln.
  • the invention also includes a rotary kiln plant for carrying out the method, the plant comprising a rotary kiln; a stationary outlet casing at the material outlet end of the kiln; supporting means within the outlet casing for supporting the waste during incineration; and an inlet in the wall of the casing through which inlet waste can be introduced into the casing for being supported by the supporting means.
  • the adequate retention time of the waste in the outlet casing of the rotary kiln nay be achieved by means of special mechanisms which support and retain the waste in the outlet casing until complete incineration has been achieved.
  • this may be achieved by introducing the waste in such a manner that it rests on a burner pipe of the rotary kiln during the incineration, or by depositing the waste, especially where the latter consists of automobile tyres, around a substantially horizontal pipe, one end of which extends through the kiln outlet casing, the waste being pushed along the pipe, which thus supports and retains the waste during the incineration.
  • the waste may be introduced on a one or more shelves located in the kiln outlet casing and possibly provided with a horizontal surface, and pushed forward on the shelf or shelves, which support(s) the waste during the incineration.
  • the burner pipe of the rotary kiln is used for introducing and supporting the waste, it is preferred that the burner pipe, over at least some of its length, is formed with a flat or troughed upper side for improved supporting of the waste. It is further preferred that the burner pipe is provided with a number of grooves in its surface so as to ensure good air supply to the waste during the incineration.
  • the burner pipe may be provided with a projection at the end of the burner pipe to assure that any unburned, residual waste drops down to one of the sides of the pipe prior to reaching a nozzle of the burner pipe.
  • the pipe is cooled by means of a liquid or a gas, that the pipe extends through the kiln outlet casing transversely to the kiln axis and that any non-combustible waste items, such as steel reinforcements from automobile tyres, are retained on the pipe until discharged through the wall of the outlet casing.
  • the or each shelf is provided with a number of grooves in its surface in order to promote air supply to the waste for the incineration thereof.
  • the or each shelf may extends along a wall of the outlet casing so that waste can be introduced and advanced in the longitudinal direction thereof.
  • the kiln outlet casing may be equipped with one or more openings, through which any unburned, residual waste can be extracted.
  • the or each shelf may slope laterally downwards towards the wall of the kiln outlet casing along which it extends.
  • Fig. 1 depicts a sectional view of the outlet part of a rotary kiln 11, for example a kiln for burning cement clinker 25, with an outlet casing 9 and a grate cooler 13, all of which elements are of a generally known design.
  • the waste items 7 are placed in a shaft or feed hopper 5 from which the waste, while deposited on the burner pipe 1 and by means of a pushing device 3, is pushed into the chamber which is surrounded by the outlet casing 9, where the waste is ignited and burned off under the influence of the hot airstream flowing from the grate cooler 13 towards the rotary kiln 11.
  • the cross-section of the burner pipe may have a flat or slightly troughed upper side which may further be equipped with a number of grooves 25 in order to improve the supply of combustion air to the waste.
  • the burner pipe 1 may further be provided with a boss or projection 2 in order to ensure that any unburned, residual waste drops down to one of the sides of the pipe, hence preventing the waste from reaching and disturbing the main flame from the burner pipe 1.
  • the remaining design features of the burner 1 are known.
  • Fig. 3 shows a second embodiment where the waste objects 7, in the present case automobile tyres which are cut at some point on the circumference, are mounted around a pipe 17 which is led through an opening in the kiln outlet casing 9. Inside the pipe 17 there may be one or several pipes for conveying a gaseous or liquid cooling medium, preferably atmospheric air, water or oil. By means of a known pushing device 15 the waste objects can be introduced into the outlet casing 9 where they are burned off.
  • a gaseous or liquid cooling medium preferably atmospheric air, water or oil.
  • Fig. 4 shows a modification in which the pipe 17 extends transversely to the kiln axis.
  • Fig. 5 shows a third embodiment where the kiln outlet casing 9 is provided with a horizontal shelf 19 on which the waste objects 7 are introduced by means of a known pushing device 23 and burned off.
  • the shelf may be provided with grooves 21 in order to improve the supply of combustion air.
  • Figs. 6 and 7 show a fourth embodiment where a shelf 19, in the present case possibly (although not shown) sloping downwards towards the adjacent inner wall of the kiln outlet casing 9, is fitted in such a manner that the waste objects can be introduced in the longitudinal direction of the shelf parallel to the wall of the outlet casing 9.
  • the outlet casing may be provided with an opening 24 at the opposite end of the shelf for extraction of any unburned, residual waste, and the shelf 19 may be provided with grooves 21 in order to improve the supply of combustion air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Incineration Of Waste (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (17)

  1. Procédé d'incinération de déchets combustibles solides (7) dans une installation (9, 11) à four rotatif, destiné à fournir de la chaleur pour le traitement d'une autre matière transportée dans le four, caractérisé en ce que les déchets (7) sont introduits dans un carter fixe de sortie (9) à l'extrémité de sortie de la matière du four (11) et restent à cet emplacement jusqu'à ce qu'une incinération pratiquement totale ait été réalisée par contact avec un courant d'air chaud circulant dans le carter de sortie.
  2. Procédé selon la revendication 1, dans lequel les déchets (7) sont introduits de manière qu'ils soient en appui sur le tube (1) de brûleur du four pendant l'incinération.
  3. Procédé selon la revendication 1, dans lequel les déchets (7) sont suspendus autour d'une conduite pratiquement horizontale (17) dont une extrémité passe dans le carter de sortie (9), et les déchets sont poussés le long de la conduite (17) qui supporte ainsi les déchets (7) au cours de l'incinération.
  4. Procédé selon la revendication 3, dans lequel la conduite (17) est refroidie par un liquide ou un gaz.
  5. Procédé selon la revendication 1, dans lequel les déchets (7) sont introduits sur une ou plusieurs étagères (19) placées dans le carter de sortie (9), les déchets étant poussés vers l'avant sur l'étagère ou les étagères (19) qui supportent les déchets pendant l'incinération.
  6. Installation à four rotatif destinée à la mise en oeuvre du procédé selon l'une quelconque des revendications précédentes, l'installation comprenant un four rotatif (11), un carter fixe de sortie (9) placé à l'extrémité de sortie de matière du four, un dispositif (1, 17, 19) de support placé dans le carter de sortie et destiné à supporter les déchets pendant l'incinération, et une entrée formée dans la paroi du carter et par laquelle les déchets d'entrée peuvent être introduits dans le carter afin qu'ils soient supportés par le dispositif de support.
  7. Installation selon la revendication 6, dans laquelle le dispositif de support est formé par une conduite (1) de brûleur qui, sur une partie au moins de sa longueur, a une face supérieure plate ou en forme de rigole destinée à supporter les déchets (7).
  8. Installation selon la revendication 7, dans laquelle la conduite (1) de brûleur a plusieurs gorges (25) à sa surface, destinées à favoriser la transmission d'air aux déchets (7) placés sur le tube de brûleur.
  9. Installation selon la revendications 7 ou 8, dans laquelle la conduite (1) de brûleur possède une saillie (2) destinée à assurer la chute des déchets résiduels imbrûlés éventuels d'un côté de la conduite (1) de brûleur avant d'atteindre l'extrémité de la tuyère de la conduite (1) de brûleur.
  10. Installation selon la revendication 6, dans laquelle le dispositif de support comprend une conduite pratiquement horizontale (17) pénétrant dans le carter de sortie (9).
  11. Installation selon la revendication 10, caractérisée en ce que la conduite (17) est placée transversalement à l'axe du four (11).
  12. Installation selon la revendication 6, dans laquelle le dispositif de support comporte une ou plusieurs étagères (19) placées dans le carter de sortie.
  13. Installation selon la revendication 12, dans laquelle l'étagère ou chaque étagère (19) a plusieurs gorges (21) formées dans sa surface et destinées à favoriser la transmission d'air aux déchets portés par la surface.
  14. Installation selon la revendication 12 ou 13, dans laquelle l'étagère ou chaque étagère (19) est placée le long d'une paroi du carter de sortie de manière que les déchets puissent être introduits dans la direction longitudinale et avancent dans cette direction.
  15. Installation selon la revendication 14, dans laquelle le carter de sortie (9) comporte une ou plusieurs ouvertures (24) par lesquelles les déchets résiduels imbrûlés éventuels peuvent être extraits.
  16. Installation selon la revendication 14 ou 15, dans laquelle l'étagère ou chaque étagère (19) est inclinée latéralement vers le bas vers la paroi du carter de sortie (9) le long duquel elle est disposée.
  17. Installation selon l'une quelconque des revendications 6 à 16, comprenant en outre un dispositif (3, 15, 23) de poussée des déchets par la sortie et le long du dispositif de support.
EP93302640A 1992-04-29 1993-04-05 Méthode d'incinération de déchets dans un four rotatif et installation à cet effet Expired - Lifetime EP0568202B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK553/92 1992-04-29
DK055392A DK171741B1 (da) 1992-04-29 1992-04-29 Fremgangsmåde og apparat til indføring og afbrænding af fast brændbart affald, så som bildæk, i en roterovn

Publications (2)

Publication Number Publication Date
EP0568202A1 EP0568202A1 (fr) 1993-11-03
EP0568202B1 true EP0568202B1 (fr) 1996-11-20

Family

ID=8094842

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93302640A Expired - Lifetime EP0568202B1 (fr) 1992-04-29 1993-04-05 Méthode d'incinération de déchets dans un four rotatif et installation à cet effet

Country Status (4)

Country Link
EP (1) EP0568202B1 (fr)
DE (1) DE69306034T2 (fr)
DK (1) DK171741B1 (fr)
ES (1) ES2094478T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004013883A1 (de) * 2004-03-20 2005-10-06 Khd Humboldt Wedag Ag Anlage zur Herstellung von Zementklinker mit Verwertung von Sekundärbrennstoffen

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9608341D0 (en) * 1996-04-23 1996-06-26 Blue Circle Ind Plc Disposal of waste tyres
US6210154B1 (en) 1997-04-22 2001-04-03 Blue Circle Industries, Inc. Treatment of exhaust gases from kilns
WO2012048159A2 (fr) 2010-10-07 2012-04-12 Afs Technology, Llc Système de combustion de carburant solide à suspension par broches
WO2013134186A1 (fr) 2012-03-05 2013-09-12 Afs Technology, Llc Système de combustion de combustible solide à suspension par broche

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2343954C3 (de) * 1973-08-31 1979-08-30 Krauss-Maffei Ag, 8000 Muenchen Drehrohrofen zur Verbrennung von Abfällen
DE2637330A1 (de) * 1976-08-19 1978-02-23 Kloeckner Humboldt Deutz Ag Verfahren zum brennen von zementklinker
DE2808770A1 (de) * 1978-03-01 1979-09-06 Peter Fecht Verfahren zum verbrennen von abfallstoffen und verbrennungsofen zum durchfuehren dieses verfahrens
US4984983A (en) * 1989-02-07 1991-01-15 F. L. Smidth & Co. A/S Method of cofiring hazardous waste in industrial rotary kilns
US5086716B1 (en) * 1990-04-30 1995-08-29 Perma Fix Corp System, apparatus and method for disposing of solid waste

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004013883A1 (de) * 2004-03-20 2005-10-06 Khd Humboldt Wedag Ag Anlage zur Herstellung von Zementklinker mit Verwertung von Sekundärbrennstoffen

Also Published As

Publication number Publication date
DE69306034T2 (de) 1997-03-20
DE69306034D1 (de) 1997-01-02
DK55392A (da) 1993-10-30
EP0568202A1 (fr) 1993-11-03
DK55392D0 (da) 1992-04-29
ES2094478T3 (es) 1997-01-16
DK171741B1 (da) 1997-04-21

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